1
|
Brassesco ME, Woitovich Valetti N, Picó G. Prediction of breakthrough curves in packed-bed column as tool for lysozyme isolation using a green bed. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02683-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
2
|
Woitovich Valetti N, Picó G. Adsorption isotherms, kinetics and thermodynamic studies towards understanding the interaction between cross-linked alginate-guar gum matrix and chymotrypsin. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1012-1013:204-10. [DOI: 10.1016/j.jchromb.2016.01.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 01/14/2016] [Accepted: 01/20/2016] [Indexed: 01/21/2023]
|
3
|
Francis NL, Hunger PM, Donius AE, Wegst UGK, Wheatley MA. Strategies for neurotrophin-3 and chondroitinase ABC release from freeze-cast chitosan-alginate nerve-guidance scaffolds. J Tissue Eng Regen Med 2014; 11:285-294. [PMID: 24889394 DOI: 10.1002/term.1912] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 02/28/2014] [Accepted: 04/20/2014] [Indexed: 11/07/2022]
Abstract
Freeze casting, or controlled unidirectional solidification, can be used to fabricate chitosan-alginate (C-A) scaffolds with highly aligned porosity that are suitable for use as nerve-guidance channels. To augment the guidance of growth across a spinal cord injury lesion, these scaffolds are now evaluated in vitro to assess their ability to release neurotrophin-3 (NT-3) and chondroitinase ABC (chABC) in a controlled manner. Protein-loaded microcapsules were incorporated into C-A scaffolds prior to freeze casting without affecting the original scaffold architecture. In vitro protein release was not significantly different when comparing protein loaded directly into the scaffolds with release from scaffolds containing incorporated microcapsules. NT-3 was released from the C-A scaffolds for 8 weeks in vitro, while chABC was released for up to 7 weeks. Low total percentages of protein released from the scaffolds over this time period were attributed to limitation of diffusion by the interpenetrating polymer network matrix of the scaffold walls. NT-3 and chABC released from the scaffolds retained bioactivity, as determined by a neurite outgrowth assay, and the promotion of neurite growth across an inhibitory barrier of chondroitin sulphate proteoglycans. This demonstrates the potential of these multifunctional scaffolds for enhancing axonal regeneration through growth-inhibiting glial scars via the sustained release of chABC and NT-3. Copyright © 2014 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Nicola L Francis
- School of Biomedical Engineering, Science, and Health Systems, Drexel University, 3141 Chestnut Street, Philadelphia, PA, 19104, USA
| | - Philipp M Hunger
- Department of Materials Science and Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, PA, 19104, USA.,Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH, 03755, USA
| | - Amalie E Donius
- Department of Materials Science and Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, PA, 19104, USA
| | - Ulrike G K Wegst
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH, 03755, USA
| | - Margaret A Wheatley
- School of Biomedical Engineering, Science, and Health Systems, Drexel University, 3141 Chestnut Street, Philadelphia, PA, 19104, USA
| |
Collapse
|
4
|
Abstract
Alginate is a polysaccharide that is a block polymer consisting of block units of guluronic acid and mannuronic acid. It shows inherent biological affinity for a variety of enzymes such as pectinase, lipase, phospholipase D, a and ss amylases and glucoamylase. Taking advantage of its precipitation with Ca2+ and the above-mentioned property, alginate has been used for purification of these enzymes by affinity precipitation, aqueous two phase separation, macroaffinity ligand facilitated three phase partitioning, immobilized metal affinity chromatography and expanded bed affinity chromatography. Thus, this versatile marine resource has tremendous potential in bioseparation of proteins.
Collapse
Affiliation(s)
- Sulakshana Jain
- Chemistry Department, Indian Institute of Technology, New Delhi, India
| | | | | |
Collapse
|
5
|
Sardar M, Varandani D, Mehta B, Gupta MN. Affinity directed assembly of multilayers of pectinase. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420802090834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
6
|
Single-step purification of recombinant green fluorescent protein on expanded beds of immobilized metal affinity chromatography media. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2008.07.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
7
|
Affiliation(s)
- Kalyani Mondal
- Chemistry Department, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | | | | | | |
Collapse
|
8
|
Pluemsab W, Sakairi N, Furuike T. Synthesis and inclusion property of α-cyclodextrin-linked alginate. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.08.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
9
|
Roy I, Sardar M, Gupta MN. Cross-linked alginate–guar gum beads as fluidized bed affinity media for purification of jacalin. Biochem Eng J 2005. [DOI: 10.1016/j.bej.2005.01.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
10
|
Roy I, Gupta MN. Purification of a bacterial pullulanase on a fluidized bed of calcium alginate beads. J Chromatogr A 2002; 950:131-7. [PMID: 11990986 DOI: 10.1016/s0021-9673(02)00053-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Pullulanase from Bacillus acidopullulyticus was purified on a packed bed and a fluidized bed of calcium alginate beads. The binding of enzyme activity to the medium was found to follow Langmuir isotherm pattern. The maximum binding capacity was 1476 U ml(-1) matrix and the dissociation constant was 142 U ml(-1). The dynamic binding capacities at 5% breakthrough in the packed and fluidized beds were 472 U ml(-1) and 644 U ml(-1), respectively. In the packed bed as well as the fluidized bed, an activity recovery of more than 95% with fold purification in the range of 46-59 was observed. The elution with a competitive inhibitor, viz. maltose, and high-fold purification indicate an affinity-based process. The purification process worked equally well with columns of bed volumes of 3.8 and 10 ml.
Collapse
Affiliation(s)
- Ipsita Roy
- Chemistry Department, Indian Institute of Technology, Hauz Khas, New Delhi
| | | |
Collapse
|